DE1915219A1 - Rack and pinion - Google Patents

Description

Rack and pinion drive

Your invention relates to a rack and pinion drive through a pinion housing and a tubular one the rack housing connected to the pinion housing extending rack and it is arranged a Zahnrltselgahanse, engaging in the rack and su the movement of which is in the direction of the bit, where the rack is a rack housing in a bearing bush stored differently 1st. Such a rack and pinion drive serves, for example, rarely to transmit the movement of an it to the steerable rider of a road vehicle.

, The invention is particularly xugrunde the task so cussubilden a rack and pinion drive of the type described in DAB • J9tr3sungssittel _t mainly oil or Daft * over the Zahnstangengehios · fön a bath · the bearing bush reach afHeren sus "

With rack and pinion drives of this type, it is allgssein usual, a * bargain of nerds close the Zahnet, the sieve over the Lagerbüchs · and üb · * d- UTmetOTgengehlnee hinetts ers "reokt _t

JHM been Torgeeohlagenen ISeongen that -from the Oberstroaen of. Stirosnng8Blttels one side of the bearing bush mat should other he "Ogllchen, consisted between Zahnetange and the bore of the bearing bush one or 'eee Surohtrlttekanile Torsusehen, either with deir rack even a look in Ilnsarlentuns first! »S &« flattening was done or where in the Bolirusg legerbaohse one or more sieve im

atreokende plumb bobs were attached

these LöeuDgen not vuiriedenetellenä, viii * 1 * di · eleltends «Xontakt ait * in * nder

rod and reduce laeerbohrune and thus bring Abnutsung, especially Wemm ü · e flexible or semi-solid Katerial _s "t # *" *. or Bolyttretam-LiBnetetoft »consists of» mi *

009834/1169

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usually in Miwilwiganordnnng, reached ;, the daxa /./J

serves to keep shoes and water away from the irele \

See below impair the ability of the rack to move. The . ^;

Hf i ^ lifnK fnfiff wifl 3ΐιι HHWfIiIit efo w ¥ j) this flexible Schut— i

Hose is brought to the Mn-mid, the _ <

Rack in the bearing bush from the Schutsachlaiich Change included StOTenrngsaJ / ttelTolueen and it Let deahalb desirable that this kind of thing -of one side of the bearing bush free «or located on the other ·

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Tightly the ten-rod stiffens itself from its one I & ade ** 'ens de "Zafanstaiigengehaxise and, with your other side from * de" Zabnrltftelgehaase, and both base parts of the , * rack through, flexible fipt with t ifl "*! 1 ^ n enclosed , the '' ι lint-mi "it ι the two housings a Fuiin form.. Within the rack or zualndeet an essential rope. enclosed their machine and are held in the oil and air corresponds ^f, which during the reciprocating and moving the rack from a flexible flntgMftllg sur

Material is lined, which materials have proven to be particularly suitable for this application to have.

In accordance with the invention, a rack and pinion drive is the initially mentioned described type so designed that one or more openings are provided in the wall of the rack housing, through which a flow means on the outside of the Bearing bush can pass from one side to the other.

Usually, the rack will extend beyond the rack housing and a cable of the rack length (or its end piece, which extends beyond the rack housing) is enclosed in the manner described above by a flexible protective sheath. In such a case, the opening or openings can be provided in the wall of the rack housing on the side of the bearing bushing adjacent to the pinion and within the space provided by the flexible SchutssMlll © '^ - ^^'! © sssaen laumeB «Alternatively, a 0ΐ ^ _. _o , ■■;:,.: ·, Konsea several openings »between the inner surface of the rack housing and a butt or grooves in the outer surface of the bearing bush. -

Due to the invention, the surfaces of the rack and pinion and the bearing bushing that are in sliding contact remain without interruption and wear and tear is reduced to a minimum.

An embodiment of the present invention will now be carried out explained in more detail based on the description of the luführungungfibeiepiele shown in the drawing. The drawing shows as the rope of a vehicle steering gear, partly in section,

009834/1169

BATH ORIGINAL

one end of a rack, its housing and the bearing bush.

A rack 1 is through a tubular rack housing 2 and a pinion housing (not shown) displaceable in the longitudinal direction. The rack housing 2 extends from the pinion housing and a pinion (not shown) is rotatably mounted in the pinion housing and is in engagement with a toothing, not shown, on the rack, so that the bit is rotated in a known manner, the rack 1 can be moved in the longitudinal direction through the rack and pinion housing.

The rack ⁴ I see through a bearing bush 3 which is arranged in the outer end of the rack housing 2. In the present embodiment, a composite bearing bush 3 is used, which consists of two half-length bushing parts 4 and 5 made of polyurethane, which are arranged in a housing 6 which, in turn, is arranged in the outer end of the rack housing 2. The construction of the bearing bush 1st a question of each vorteilhaftesten solution, and the invention is not limited to the illustrated bearing bush construction "embodiment example known a bushing of any known construction can be used, such as of solid I & lon or metal, provided that it has a continuous Bohrungefläche owns.

The illustrated end of the rack Λ extends beyond the saw rod housing 2 and is connected via a ttaiversmlkupplung 2a alt a tie rod 2b, which is designed to be connected to the “steerable wheel of a road vehicle”. In a similar way, the other end of the toothed rack 1 extends beyond the toothed pinion housing and is connected to a further pull rod via a universal coupling (not shown). Above the portrayed find the

009834/1169>

BATH ORIGINAL

The rack and this enveloping a bellows-like protection ο chi 7 is arranged, which is tightly clamped at one end by a clamp 7a on the pull rod 2b and at the end by a clamp 8 on the pinion housing 2 The protective loop extends over the Zagerbüchse 5 and is tightly clamped by the clamp 8 on the rack housing 2 at a point which is between the bearing bush 3 and the pinion. In a similar way, another bellows-like protective hose is arranged between the heat housing and the connecting rod, so that the protective hoses, the rack housing and the Zaimcitzel housing form a closed chamber in which the rack can move *

Bine Ansah! of openings 9 is arranged in the wall of the rack housing 2 in an area extending in the direction of the slide on the side of the sleeve 3 facing the pinion. The openings 9 are located in the rope of the wall of the rack housing, which lies in the area enclosed by the protective hose 7, and allow a fluid such as oil and air to pass between the rack housing 2 and the inside of the protective hose 7 during the and moving the rack 1 back and forth.

Each of the openings 9 is formed by a U-shaped cut 9a in the wall of the housing 2, this cut forming a tongue 10 which is pressed inwardly into the front housing 2 and the like. The tongues 10 advantageously form stops for fixation & * r Zogerbüehae in the 35 "hn * tÄgtngehSue # and the bearing bush is thereby held in contact with the aieaea tongues 10, because the 8 4 * 4 outer bathing dt» G * hfcue · " Z ia Jorm" inee inwardly directed Üanaohe »10 * is bent.

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⁰⁰⁹ ? ^{34 / 11β9}

About the end part of the protective hose 7 »that on the rack housing 2 is attached, is provided with longitudinally extending inner ribs 11, the together with the outer surface of the housing 2 one generate circumferentially extending area of longitudinally extending channels to the fluid « fIuB between the openings 9 and the outside of the toothed rack housing 2 enclosed by the protective tube To facilitate volume. The ribs 11 reinforce the protective tube 7 and prevent it from being attached to the racks » housing 2 applies, whereby the openings 9 are covered could. The number of openings is preferably not 9 equal to the number of channels formed by the ribs 11, so that with each arrangement of the protective tube 7 on the Toothed rack housing 2 always a few openings and Burchtritta ™ channels will be in communication with each other.

In the example described above, the rack 1 and its housing is essentially cylindrical, but the present invention can also be applied to toothed racks. drives are used in which the rack and / or their housing have a non-circular Qaersoh & itt ,.

3; «/ 1101 bad

Claims (1)

Patent claims 1y rack and pinion drive with a rack housing extending through a pinion housing and a tubular rack housing adjoining the pinion housing Toothed rack and with a snordered in the pinion housing, engaging in the rack and to the latter Movement in the longitudinal direction serving pinion, the rack in the rack housing in a bearing bush is displaceably supported, characterized in that one or more openings (9) are provided in the wall of the toothed housing (2) through which a fluid passes the outside of the bearing bushing (3) one side can get to the other 2 · 'Rack and pinion drive according to claim i, characterized in that that the bearing bush (5) in its outer ftnfangsflache at least one butt extending in the longitudinal direction having that with the inner surface of the Zahnstangengehäueee (2) forms the opening or openings through which Fluid past the outside of the bushing and step through the dentin ; ; know . ■. . · · / ■, · ..-, ... ; . . ; 5. tendon drive according to one of the. Claims Λ or 2, characterized in that fin «loh over $ as ten-rod: gehtaee (2) go up eretre ^ kender" ax of the toothed ruler O) I: by a flexible SchuteechlaucA (7) elnjehft1.lt let "^; and that the opening or Ulm openings (9) in the turn of Zehnetangengehtufl · «eind arranged (2) on the side facing the pinion gear side of the bearing bush (9) and calibrated within the space enclosed by the flexible Schutseehlauch tree b © flnden so Stromungemittel outside the Zahnetangengehäueee and outside of the bearing bush can get from one side to the other 009834/1169 - 8th BATH ORIGINAL ! # 15219 4. rack and pinion drive according to claim 3 »characterized in that the flexible protective tube (7) tightly sm Zahnstangengshists® (2) is attached and extends over the rack (1) or ¹ which extends beyond the rack housing, the flexible Shooting hose with inner ribs (11) extending in the longitudinal direction can be seen, which prevent the hose (7) from resting against the rack housing and love it together with the outside. of the rack housing are formed in the longitudinal direction so that the flow of fluid between the opening or the openings (9) in the wall & @ s rack housing and the outside of the Eade _: © the housing is enclosed by the protective tube @ ii ©: a Inlimem facilitate « $. Rack gear as claimed in any of claims 3 eine® © A, that are arranged in the order tJmfangsrichtung Zahnatang @ @ ng hä ^ © s in the wall @ s & Saha housing a plurality of öffnungea provided (9) " \ 6. Rack drive according to prftete ^ * "bie characterized in that the edex a * © in ZftTiTiiftilf ft iifMwiffftllil fa iftft" isi by a cut in the wall of the will what cut a tongue Xomt that that of the rack housing umechlo @ ® @ ne 7 «rack and pinion drive according to claim 6, that the inwardly protruding © protruding tongues (10) @ £ n © & the Xiagerbüchee (3) is located » 0-9834 / 1 1 β «, rack and pinion drive according to © inem de ^ preceding« claims _f, characterized in that it is part of a vehicle steering gear and the rack (1) extends at one end over the Zahastaagengehause (2) and at the other JSsde over a pinion housing and that each The end of the rack is articulated via a universal joint (2a) with the connecting rod (2b), which is intended to be connected to a steerable vehicle wheel, so that the ends of the rack are each encased by one of two flexible tube hoses, one of which is tightly connected to the Rack housing is connected and extends over the connecting rod adjoining it and the other is tightly connected to the pinion housing and extends over the connecting rod adjoining it, the rack housing, the Zabnrltselg @ häus @ w & ä forming and enclosing the flexible protective hoses within which the rack during the turning movement of the Gear pinion slidable 1st. 009834/1169 Blank page